Nut-lock.



`{40.813.4,776 Y Patented Oct. l0, I899L' R. H. THIIMPSJNl RUT LOCK.

[Application Feb. 25, 1899.). (No Model.)

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" UNITE-D v STATES,

PATENT Ormea.

'RICHARD HENRY THOMPSON, or* oscnoLA MILLs, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters' Patent No. 634,776, dated october 1o, 1899.'

Application filed February 25, 1899. Serial No. 706 ,780l (No model.)

'a new land Improved Nut-Lock, of which the following is a full, clear, and exact descrip-v tion. v The object ofthe invention is to providey a new and improved nut-lock which is' simple and durable in constrution and arranged to permit a convenient screwing up of, theV nut and to automatically lock the nut against return movement. v l

The yinvention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodimentof myinvention is represented inthe accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views. l

Figure l is a sectional face viewr` of the improvement. Fig. 2 is a sectional side elevation of the same. Fig. 3 is a sectional face View of a modified form of the improvement, and Fig. 4 is a sectional side elevation of the same. f A

The nut A, provided with the nut-lock, screws on the bolt Bin the usual manner and is formed with a pocket A', having its opening at the bore of the nut on the screw-threads,'

the outer wall of said pocket being eccentric tothe threads. In the pocket A is held a roller C, preferably formed with teeth and adapted to ride on the threads of the bolt B.-

When the nut A is screwed up, a spring D, held in the pocket A', presses against the peripheral surface of the roller to hold the same with the opposite side, in contact with the threads ofthe bolt B. When the nut A is screwed up, it is locked against return movement by the said roller C, as screwing thenut inthe reverse direction `Will bind on the threads of the ,bolt B, and thus prevent turning of the nut. y

As shown in Fig. 1, the pocket A is narrowest at its middle and large at its ends to permit of passing the roller C from one end of the pocket A' to the other when unscrew` heavy wrenclnso that the nut can be unserewed, ifdesired, as soon as the roller has passedinto the other end of the pocket. Normally, however, the nut is securelylocked ingthe nut A with force by the-use of a very against return movement by the Toner to pre" Y ventthe nutfrom jarring or otherwise working loose.

As shown in Fig. 3, the nut Aihas its pocket A3 formed large at one end only, so that the nut cannot be unscrewed even by the use of a heavy wrench, as the roller C firmly binds and cuts into the threadsof the bolt B' upon unscrewing the said nut. The spring D' shown in this construction serves to hold theY roller C in contact with the threads of the bolt B', and the pocket A3 is located at the When the roller and the sprin g are removed' from the pocket, the nut can be used in the same manner as nuts of ordinary construction. Itis understood that the form of pocket Ashown in Fig. l can be substituted for that of pocket A3, and vice versa;

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. A nut-lock, comprising a nut havinga pocket formed therein and communicating with the bore of the nut, the outer Wall of the pocket extending eccentrically to the bore of the nut and the pocket having one portion larger than the other, a roller mounted in the pocket and adapted to bind between the outer wall thereof and the bolt to lock the nut, and a spring.mounted in the pocket and extend- `ing along the outer wall thereof, the spring bearing against the outer side of the roller, to throwthe same radially toward the bolt.

2. A nut-lock, comprising a nut having a l pocket therein, the pocket communicating' pocket formed therein, the ends of the pocket I being enlarged and the intermediate portion of the pocket bein g; contracted with respect to i the ends, and a roller mounted iu the pocket l 5 and adapted to bear against one wall thereof and against the bolt, the roller fitting loosely in the large end portions of the pocket and l binding' at the small intermediate pox-tion thereof.

RICHARD HENRY THOMPSON.

Witnesses:

WM. BENIT BoALIoH, WM. HOWARD WILKINSON. 

